Our Faculty
Meet Our Team
Gerardo Moreno, MD, MSHS
Chair and Professor
Dr. Gerardo Moreno is Professor and Chair of the Department of Family Medicine, and an elected member of the National Academy of Medicine. He serves on the Board of Directors for the American Board of Family Medicine (ABFM, Board Chair 2024-2025) and on NIH Study Section NIA-AGCD3 (Career Development for Clinicians/Health Professionals Review Committee) (formerly Clinical Aging study section NIA-C). Dr. Moreno earned his MD at the UCLA School of Medicine, a Master of Science in Health Services from the UCLA School of Public Health and completed a post-doctoral research fellowship in the Robert Wood Johnson (RWJ) Foundation Clinical Scholars Program at UCLA. He is Director of UCLA PRIME-LA (Program in Medical Education) which focuses on Leadership and Advocacy for underserved communities. He is a clinician investigator and his current research focuses on studying effective healthcare delivery in communities for uninsured vulnerable populations and older adults. His areas of expertise include diabetes in older adults, the evaluation of health system and community level interventions for vulnerable populations, primary care physician workforce, public health and social determinants of health, language-based disparities in healthcare, and medical education programs. Dr. Moreno has published clinical guidelines on diabetes among older adults and studies that have increased our understanding of health disparities and the social determinants of health, and has published on other important issues addressing the primary care physician workforce, family medicine, and medical education. Dr. Moreno has a continuity clinic and trains family medicine residents and UCLA medical students. Dr. Moreno is principal investigator of a multi-year evaluation of a novel primary care coverage program for low-income uninsured and patients receiving care in 23 community health centers across 21 California counties. He served as an associate editor for the Annals of Family Medicine and now serves on the journal’s Board of Directors.
Steven Shoptaw, PhD
Professor and Vice Chair of Research
Dr. Steven Shoptaw is Professor in Family Medicine and Psychiatry and Behavioral Sciences, and Vice Chair for Research in Family Medicine at UCLA. He is a licensed psychologist and Director of the UCLA Center for Behavioral and Addiction Medicine. His research portfolio focuses on the medical treatment of addiction and HIV prevention in the context of addiction. The research Dr. Shoptaw conducts is translational, meaning he works with basic science researchers and with clinicians to study the ways that drugs of abuse, especially methamphetamine, affect biological processes relevant to HIV transmission.
Dr. Shoptaw energetically pursues research, clinical, and policy efforts to bring novel and high-impact solutions to deliver culturally-competent care for persons affected by addictions and HIV. These solutions have ranged from addressing housing issues for homeless persons living with HIV and concomitant substance use or mental health disorders, to evaluating the impact of using a mobile medical unit to initiate and maintain medication for persons with opioid use disorders who are living with HIV. In addition to his extensive research portfolio, Dr. Shoptaw maintains a limited clinical psychology practice at UCLA, treating patients with severe substance use and mental health disorders.
Denise K. Sur, MD
Clinical Professor and Vice Chair of Education
Dr. Denise Sur is Vice Chair for Education in Family Medicine at UCLA, and Director of the department's Family Medicine Residency program. She joined UCLA in 1991 and teaches UCLA medical students and residents across multiple venues. Her areas of academic and clinical interest include immunizations in primary care, women's health, and care of patients. Her personal interests include balancing her life as a wife and mother of four with her professional interests. Dr. Sur received her BA from UC Berkeley in Biology and her MD from the University of California, Davis.
Martin A. Quan, MD
Professor Emeritus and Vice Chair of Academic Personnel
Dr. Martin Quan is Professor Emeritus of Clinical Family Medicine and Vice Chair of Academic Personnel in the Department of Family Medicine. Dr. Quan is a former program director of the UCLA Family Practice Residency Program and currently serves as Director of the Office of Continuing Medical Education for the medical school. He received his medical degree from the UCLA School of Medicine, where he also completed his family medicine residency. In practice for more than 20 years, Dr. Quan was named as one of Los Angeles Magazine’s Top Doctors in 2018.
Arthur N. Ohannessian, MD
Associate Clinical Professor and Vice Chair of LA County Clinical Operations
Dr. Arthur "Art" Ohannessian is Associate Clinical Professor and Vice Chair in the Department of Family Medicine, and a previous Associate Program Director for the UCLA Family Medicine Residency Program. Dr. Ohannessian obtained his medical degree from the University of California San Diego (UCSD) School of Medicine in 2008. He completed his specialty training in Family Medicine at UCLA and subsequently joined the UCLA Family Medicine Residency Core Faculty in 2011. He serves as the Site Director and Lead Physician for the UCLA Family Medicine Clinic at the Mid-Valley Comprehensive Health Center in Van Nuys. He is a full-time clinician and educator who practices full spectrum Family Medicine in both the inpatient and outpatient settings, including obstetric care. He is active member of the American Academy of Family Physicians (AAFP) and has served in multiple leadership roles at the state and national level. He currently serves on the Board of Directors for the California Chapter of the AAFP and is a member of the National AAFP Commission on Education. His academic interests include providing primary care services to communities and developing healthcare related legislative policy. He is actively engaged in community advocacy through service projects at UCLA and is the Director of Project HEAL (Health Education and Leadership) at UCLA. During his free time Dr. Ohannessian enjoys playing basketball, attending live concerts, and is a devout supporter of UCLA Athletics.
Phillip Brown, MD
Assistant Clinical Professor and Vice Chair of JEDI
Dr. Phillip Brown received his BA from the University of San Francisco and his MD from Howard University. He completed a residency in Family Medicine at UCLA, after which he stayed on as chief resident and then joined the department faculty. He Vice Chair for Justice, Equity, Diversity and Inclusion, an the Program Director for the Community Medicine Fellowship. Dr. Brown is a recipient of the AAFP’s 2024 Exemplary Teaching Award in Medical Education. His areas of academic interest include endocrinology, mental-health related disorders, and musculoskeletal injuries. In his free time he enjoys going to comedy shows, watching movies, playing ultimate frisbee, and volleyball. He is on a forever quest for the best pasta, tacos, and dessert in LA.
Ronald Brooks, PhD
Assistant Professor
Dr. Ronald Brooks is an Assistant Professor in the Department of Family Medicine who has been involved in HIV-related research and has provided training and technical assistance to providers involved in HIV medical care and prevention services for over 15 years. He is the principal investigator of the Health Resources and Services Administration, Special Projects of National Significance, Evaluation and Technical Assistance Center (ETAC) for the Use of Social Media to Improve Engagement, Retention, and Health Outcomes along the HIV Care Continuum Initiative which leads a national multi-site implementation and evaluation study. He is also PI of an NIMH R21 grant examining Pre-Exposure Prophylaxis (PrEP)-related stigma among Black and Latino men who have sex with men (MSM). In addition, he serves as a Co-Principal Investigator on a California HIV/AIDS Research Program-funded research study evaluating the use of social media in identifying and linking Latino MSM to HIV medical care and prevention services, and as Co-Investigator of the ETAC for the SPNS Outreach, Access and Retention among Latino/a Populations initiative. Dr. Brooks has extensive experience in providing training and technical assistance to multiple target populations (e.g., health departments, community-based organizations (CBO), and health clinics), and is committed to undertaking social and behavioral research that will facilitate the adoption of biomedical HIV prevention strategies among minority MSM and other marginalized populations.
Christal Clemens, MD
Associate Physician Diplomate
Dr. Clemens is a Staff Associate Physician in the Department of Family Medicine. She completed her Family Medicine Residency clinical training at the UCLA David Geffen School of Medicine, her MD degree at Central Michigan University College of Medicine. We are thrilled that she is staying with the department. Dr. Clemens will primarily see patients at the UCLA Health Family Health Center and is looking forward to developing long-term relationships with patients, and maintaining a broad scope of practice. Her scholarly interests are tele-health use, Community Medicine, Street Medicine, Global Health, Health Policy & Advocacy, Health Equity, Academic Medicine and Mentorship.
Jack Chen, MD
Assistant Clinical Professor
Dr. Jack Chen is a Health Sciences Assistant Clinical Professor in the Department of Family Medicine. He graduated summa cum laude and phi beta kappa with a Bachelor of Science degree in Psychobiology from the University of California, Los Angeles (UCLA). Dr. Chen went on to earn his medical degree at The Robert Larner, M.D. College of Medicine at The University of Vermont. He then completed his family medicine residency, sports medicine track, at the University of Iowa, where he had the privilege of serving as a chief resident. He then pursued his Primary Care Sports Medicine Fellowship at the University Hospitals Cleveland Medical Center. As part of his fellowship, Dr. Chen served as a team physician for Hawken High School and Lake Erie College. He also provided medical care for the Cleveland Browns and the Cleveland Monsters. He is a member of the American Medical Society for Sports Medicine and American Academy of Family Physicians.
Dr. Chen is passionate about musculoskeletal medicine and sports medicine. He is a proponent of exercise and movement in maintaining overall health and is committed to delivering care that empowers his patients to pursue the level of activity they desire. Dr. Chen specializes in diagnosis and management of acute and chronic sports injuries, osteoarthritis, injury prevention and rehabilitation, and musculoskeletal ultrasound guided procedures.
In his free time, he enjoys spending time with friends and family, being active and being outside! He is a sports fanatic and enjoys attending sporting events. His lifelong goal is to visit all 30 major league baseball ballparks.
Joy Chudzynski, PsyD
Clinical Psychologist
Dr. Joy Chudzynski is a licensed Clinical Psychologist at UCLA’s Center for Behavioral and Addiction Medicine in the Department of Family Medicine. She provides short-term, evidence-based treatments for a range of psychological and substance use problems within a primary care setting. She also works with UCLA Sports Medicine where she conducts assessments and provides psychological services for athletes. Dr. Chudzynski conducts clinical trainings on evidence-based practices with substance users for mental health and substance abuse treatment agencies throughout Southern California and maintains a small private practice focusing on clients with co-occurring disorders.
Dr. Chudzynski earned her doctorate in Clinical Psychology from Pepperdine University and completed a post-doctoral fellowship at Cedars-Sinai Medical Center, Department of Psychiatry and Behavioral Neurosciences, where she specialized in Cognitive-Behavioral Therapy and Dialectical Behavior Therapy. Areas of expertise include Motivational Interviewing, the neurobiology of drug abuse, CBT and DBT interventions, and trauma-informed treatment with co-occurring disorders.
Brian Donohoe, MD
Assistant Clinical Professor
Dr. Donohoe is a Primary Care Sports Medicine physician within the Departments of Family Medicine and Orthopaedic Surgery. He specializes in the diagnosis and management of non-surgical orthopedic issues, caring for athletes and active individuals of all ages and levels. He is considered an expert in musculoskeletal ultrasound and has expertise in minimally invasive orthopedic procedures, including ultrasound-guided joint injections (knee, hip, shoulder, wrist, elbow, and ankle).
He completed his Sports Medicine fellowship training at UCLA, where he served as team physician for Santa Monica High School and assistant team physician for UCLA Athletics, the Los Angeles Lakers, and the Los Angeles Dodgers. Dr. Donohoe completed his residency training in Family Medicine at UCLA, where he was also named Chief Resident. He received his medical degree from David Geffen School of Medicine at UCLA and his undergraduate degree from University of California, San Diego, where he was a member of the NCAA Men’s Water Polo team. He is a member of the American Medical Society for Sports Medicine, American College of Sports Medicine, and American Academy of Family Physicians.
Tom Donohoe, MBA
Adjunct Professor
Tom Donohoe is an Adjunct Professor in the Department of Family Medicine, and is director of the UCLA/Pacific AIDS Education and Training Center (AETC), a collaboration among the David Geffen School of Medicine at UCLA, the USC Keck School of Medicine, and Charles R. Drew University of Medicine and Science and administered through UCLA. AETC seeks to integrate high-quality, comprehensive patient-centered and person-focused HIV care, and aims to improve health outcomes, especially in marginalized and disenfranchised communities including, but not limited to, people with mental illnesses and substance use disorders, the homeless or unstably-housed, recently incarcerated, LGBTQ+, immigrants, and communities of color.
Calvin Duffaut, MD
Associate Clinical Professor
Dr. Calvin Duffaut joined UCLA as an Assistant Clinical Professor of Family Medicine and Orthopaedic Surgery after completing his Sports Medicine specialty training with UCLA in 2016. He received his medical degree from the University of Southern California and completed his residency in Internal Medicine and Pediatrics at LAC + USC Hospital. Dr. Duffaut earned his bachelor’s degree at UC San Diego where he played on the intercollegiate basketball team. He plans to further pursue research in the area of depression among intercollegiate student-athletes. In his position at UCLA, Dr. Duffaut cares for sports medicine patients of all ages and also provides primary care services at the UCLA Family Health Center. He also serves as the team physician of El Segundo High School. Dr. Duffaut is a member of the American Medical Society for Sports Medicine, American College of Sports Medicine and the American Academy of Pediatrics.
Karen Duvall, MD, MPH
Adjunct Assistant Professor
Dr. Karen Duvall is Adjunct Assistant Professor in the Department of Family Medicine. She was Director of the Preventive Medicine Residency Training Program for eight years. Recently she helped develop and direct a new Population Health fellowship in the Department. Dr. Duvall is currently involved in developing a 3-year medical school curriculum that will lead directly into the Family Medicine Residency Program. Dr. Duvall received her BA from Johns Hopkins University, MD from the University of Arizona, and MPH from the UCLA Fielding School of Public Health. She completed her residency training in general preventive medicine and public health at UCLA, followed by a fellowship in clinical nutrition. She is a Fellow of the American College of Preventive Medicine. Dr. Duvall's research interests have included reducing the risk of breast cancer through preventive measures such as nutrition and healthy lifestyle as well as designing non-invasive detection methods that may identify women at high risk for developing breast cancer. Currently she is involved in research studying the microbiome of the breast.
Frederick Ferguson, MD, MSPH
Assistant Clinical Professor
Frederick Ferguson, MD, MS is a HS Assistant Clinical Professor in the Department of Family Medicine at the David Geffen School of Medicine at UCLA. He completed his medical degree through the UCLA/Charles R. Drew Medical Education Program and his residency in Family Medicine at UCLA. Dr. Ferguson is also a recent graduate of the National Clinician Scholars Program (NCSP) at UCLA, where his research focused on health services, healthcare access, and institutional trust among structurally marginalized populations. His work includes investigations into cardiovascular risk and the impact of mission-oriented training programs on physician practice in medically underserved settings. Clinically, he provides primary care at our UCLA safety-net family health Mid Valley Comprehensive Health Center and mentors medical students and residents. He was honored as a DGSOM 2025-2027 Bruin Scholar for her commitment to research that advances the heath and health care of communities and patient populations.
Yulsi Fernandez Montero, MD
Assistant Clinical Professor
Dr. Yulsi Fernandez Montero is Assistant Clinical Professor. She graduated with BS in Biology and earned her medical degree at UCLA. Dr. Fernandez Montero also completed residency in Family Medicine at UCLA and after graduating, completed a PGY 4 Chief Resident year, and stayed on with the department to complete her Addiction Medicine Fellowship. As a medical student, she was part of the PRIME-LA program where she completed a masters degree in public health in addition to her MD degree. Dr. Fernandez practiced primary at MLK Community Hospital for several years before joining the faculty at UCLA.
Lillian Gelberg, MD, MSPH
Professor
Dr. Lillian Gelberg, MD, MSPH is a family physician, professor, and experienced health services researcher in the Department of Family Medicine at the UCLA David Geffen School of Medicine, the Department of Health Policy and Management at the Fielding School of Public Health, and the Office of Healthcare Transformation and Innovation of the VA Greater Los Angeles Healthcare System. She is an elected member of the National Academy of Medicine of the National Academy of Sciences. Dr. Gelberg has been PI or co-PI on over $38 million of research funding, published over 150 peer-reviewed papers, and mentored over 100 young investigators. She has worked with low-income diverse patients of our federally qualified community health centers and homeless populations including Veterans and their families, and is advancing the national agenda to end homelessness and to promote healthy lifestyle change via integration of prevention into primary care - to reduce risky substance use, obesity and other metabolic diseases.
Joshua Goldman, MD, MBA
Associate Clinical Professor
Dr. Josh Goldman is Associate Clinical Professor of Family Medicine and Orthopaethic Surgery. He serves as the Director of the UCLA Sports Medicine Fellowship, the Associate Director of the UCLA Steve Tisch BrainSPORT program, and the Associate Director of the Orthopedic Institute for Children's Center for Sports Medicine. He is a team physician for the UCLA Department of Intercollegiate Athletics, providing care for the football, men's soccer, and women's water polo teams. He has also served as a physician at the United States Olympic Training Center in Colorado Springs, CO and the Association of Volleyball Professionals Tour in Manhattan Beach, CA. Dr. Goldman’s research interests include concussion in sport, training load and injury, and youth sports. He received both his medical degree and Master in Business Administration from the University of Southern California, completed residency training in Family Medicine at UCLA, and received his Sports Medicine specialty training at UCLA. He is a member of the American Medical Society for Sports Medicine, American College of Sports Medicine, and American Academy of Family Physicians.
Geoffrey Gusoff, MD, MSPH, MBA
Assistant Clinical Professor
Dr. Gusoff is an HS Assistant Clinical Professor in the Department of Family Medicine. Dr. Gusoff obtained a BA degree in Public Policy and Religious Studies from Brown University, a Master of Theological Studies in Social Ethics from Boston College, an MD/MBA from the Perelman School of Medicine and the The Wharton School at the University of Pennsylvania, and an MSPH from the UCLA Fielding School of Public Health. He completed Family Medicine Residency clinical training at the University of Pennsylvania. Dr. Geoff Gusoff is a board-certified family physician and completed his post-doctoral research fellowship with the National Clinician Scholars Program (NCSP) at UCLA. His work focuses on the social and structural determinants of health, including a focus on the health impacts of innovative housing and business ownership models. He is particularly interested in the ways that home care cooperatives - businesses owned and controlled by home health aides - impact job quality and care quality in the home care industry, which is currently in the midst of a growing workforce crisis. Dr. Gusoff's research is funded by the Cornell University Center for Applied Research on Work (CAROW). A Pisacano Scholarship for Family Medicine Leadership recipient, Dr. Gusoff also teaches and mentors residents.
Timothy McCajor "Cage" Hall, MD, PhD
Assistant Clinical Professor
Timothy McCajor “Cage” Hall, MD PhD, is a psychiatrist and anthropologist and Health Sciences Assistant Clinical Professor of Family Medicine. Dr. Hall grew up on a family farm in the San Joaquin Valley and in the Monterey Bay area and then studied medieval history and literature at Harvard University. He attended medical school at UCSD, where he also earned a PhD in psychological anthropology working with Tanya Luhrmann and Roy D'Andrade. He did postdoctoral work in Human Development at the University of Chicago for two years before coming to UCLA for residency in general psychiatry. He initially joined Family Medicine for postdoctoral training in Addiction Medicine in 2011.
Ironically, Dr. Hall initially went to medical school to be a psychiatrist, but for a while seriously considered Family Medicine instead, as the whole-patient, comprehensive approach of primary care resonated with him deeply. He has been very happy working as a psychiatrist in Family Medicine, supervising Family Medicine residents in their behavioral medicine rotations, and co-managing patients with their primary care physicians.
Clinically, Dr. Hall sees adult and older adult patients for general psychiatry concerns at the Family Health Center and at UCLA’s Center for AIDS Education and Research (CARE). Dr. Hall has carried out ethnographic and mixed-methods fieldwork in Prague, Czech Republic since 1999, looking at processes of sexual identity development and mental health concerns among gay and bisexual men. In Los Angeles he has an ongoing mixed-methods project since 2011 looking at sexual identity, substance use, and HIV risk factors among men who have sex with men (MSM) who do not identify as “gay”. He also participates as clinical staff on studies through the UCLA Vine Street Clinic. Clinical and research interests include bipolar and other mood disorders, personality disorders, dual diagnosis, sexuality and sexual identity, and HIV.
Joy Hao, MD, PhD
Assistant Clinical Professor
Dr. Joy Hao is Assistant Clinical Professor in the Department of Family Medicine with a particular focus on addiction medicine. She earned her medical degree and doctorate from New York University, did her residency at Montefiore Medical Center at the Albert Einstein College of Medicine, and a fellowship at Beth Israel Medical Center. She is board certified in both Internal Medicine and Addiction Medicine.
Keith Heinzerling, MD, MPH
Associate Clinical Professor
Dr. Keith Heinzerling is Associate Clinical Professor in Family Medicine. He received his BA in Human Biology and his MD from Stanford University, and completed residency in Internal Medicine/Primary Care at NYU Medical Center and Bellevue Hospital where he was Chief Resident in Medicine. He then completed the UCLA Robert Wood Johnson Clinical Scholars Program, during which he obtained an MPH from the UCLA Fielding School of Public Health.
Ann M. Hernandez, MD, MS, MPH
Assistant Clinical Professor
Dr. Hernandez is an HS Assistant Professor in the Department of Family Medicine. She completed her clinical training in the UCLA Family Medicine Residency Program and her MD degree at UCLA School of Medicine. While at DGSOM, she completed an MPH in the UCLA Fielding School of Public Health and was part of the UCLA Program in Medical Education in Leadership and Advocacy (PRIME-LA).
Dr. Hernandez was honored as a 2023-2025 Bruin Scholar for her commitment to research that advances the heath and health care of diverse patient populations. This prestigious award funds her current research. Dr. Hernandez is also the recipient of a UCLA LIFT-UP pilot research grant to explore doctor-patient decision-making about new pharmacologic treatments (GLP-1 agonists and SGLT-2 inhibitors) among Spanish-speaking patients with diabetes. Her research interests are telehealth use among marginalized populations, Latinx health and healthcare, pathway programs, and health equity. She completed a 2-year UCLA T32 NRSA Primary Care & Health Services Research Fellowship and a Master of Science in Health Policy and Management at UCLA.
Dr. Hernandez mentors medical students and residents and serves as a co-director for the Department's pathway program for high school students in Van Nuys.
Amanda Honsvall Hoefler, MD
Associate Physician Diplomate
Dr. Amanda Honsvall is a Primary Care Sports Medicine physician within the UCLA Departments of Family Medicine and Orthopedic Surgery, Division of Sports Medicine. Dr. Honsvall joined the UCLA Division of Sports Medicine after first working as a Sports Medicine physician within the University of Minnesota Department of Orthopedics, where she cared for patients of all ages with orthopedic injuries, served as medical director for the USA Cup International Youth Soccer Tournament and assisted in the care of the UMN Gophers Women's Basketball team. Dr. Honsvall received her medical degree from the University of Minnesota and completed her residency in Family Medicine at the University of Minnesota Methodist Hospital. As a resident, she was honored as an AMSSM Resident Scholar for her dedication and contribution to Sports Medicine. She received her Sports Medicine fellowship specialty training at UCLA, where she served as team physician for Santa Monica High School and assistant team physician for the UCLA Department of Intercollegiate Athletics, the Los Angeles Lakers and the Los Angeles Dodgers. She specializes in diagnosis and treatment of non-surgical orthopedic issues and injuries among athletes and active people of all ages. Her clinical and research interests include musculoskeletal ultrasound and ultrasound-guided procedures, orthobiologics, injury prevention and treatment, youth sports and youth physical activity promotion. She is a member of the American Medical Society for Sports Medicine, American College of Sports Medicine and American Academy of Family Physicians.
Alexandra Hospodar, MD
Assistant Clinical Professor
Dr. Alexandra Hospodar is a board-certified Family Medicine physician who completed her addiction medicine fellowship at UCLA. She provides compassionate, evidence-based care to patients with substance use disorders and co-occurring mental health conditions, with an emphasis on patient-centered treatment.
She completed her family medicine residency at Kaiser Permanente Los Angeles Medical Center, where she provided care to patients in both a hospital and community clinic setting. Her clinical interests include addiction medicine, preventive care, and health equity.
Dr. Hospodar speaks English and Spanish and is passionate about working with underserved communities. Outside of clinic, she enjoys music, writing, and spending time with her family and two cats.
Taylin Im, MD
Assistant Clinical Professor
Dr. Taylin Im is a board-certified family physician with broad clinical experience in full-spectrum primary care, including obstetrics, reproductive health, addiction medicine, and procedures. Dr. Im completed medical school at Loma Linda University and Residency at the Tufts University Family Medicine Residency at Cambridge Health Alliance, with an Area of Concentration in Maternity Care. Dr. Im is part of the 2025-2026 UCLA Heath Faculty Development Program for Physicians Caring for LGBTQ+ Populations. Most recently, she worked for 2 years at Lynn Community Health Center and Salem Hospital in Massachusetts while also teaching medical students at Tufts University School of Medicine. She covered Labor and Delivery call once a week. Dr. Im brings a deep commitment to health equity, LGBTQ+ health, medical education, and inclusive care.
Ereni Katsaggelos, MD, MS
Assistant Clinical Professor
Dr. Ereni Katsaggelos is an Assistant Clinical Professor in Family Medicine. She completed a Bachelor of Arts degree in Psychology with a minor in Global Health at Northwestern University. She then completed a Master of Science degree in Urban Education at Johns Hopkins University. Dr. Katsaggelos received her Doctor of Medicine degree in 2020 from the University of Illinois College of Medicine at Chicago. She then completed her Family Medicine residency training at UCLA in 2023.
Jesse Kao MD, MFT
Assistant Clinical Professor
Dr. Kao brings a foundation in full-spectrum family medicine with expertise in behavioral medicine, refugee health and cognitive behavioral therapy. He completed an additional year of training in order to receive his Masters in Marriage and Family Therapy. He served as Chief Resident and Behavioral Medicine Chief during residency, and he was awarded the STFM Resident Teacher Award for his contributions to medical education. His interests include integrating behavioral health into primary care, inpatient medicine, teaching, and advancing inclusive, trauma-informed care.
Olivia Ishibashi, MD, MPH
Assistant Clinical Professor
Dr. Olivia Ishibashi is a board-certified family physician who practices in Santa Monica, California. Her areas of clinical focus are geriatrics, preventive care, chronic disease management, primary care procedures, and medical education. She is co-chair of the Family Medicine Core Clerkship for medical students.
Dr. Ishibashi grew up in a multicultural, multigenerational family in Los Angeles that ultimately sparked her interest in geriatric and community medicine. She went to Stanford University for her undergraduate studies in Human Biology, then received the Rotary Ambassadorial Scholarship to complete a Graduate Certificate in Experimental Medicine from McGill University in Montreal, Quebec. Following her graduate studies, she returned to Southern California to work in both the public and private health sectors. She then completed her medical degree and earned a Master of Public Health (MPH) at UCLA’s David Geffen School of Medicine through the Programs in Medical Education in Leadership and Advocacy (PRIME-LA) program.
During her leisure time, she takes pleasure in spending quality moments with her expanding family, exploring new restaurants, and unwinding at the beach.
Micah Johnson, PhD Associate Professor
Dr. Micah Johnson, PhD, a medical sociologist, received his doctorate degree from the University of Florida. His research and leadership made significant contributions to understanding trauma and behavioral health outcomes. His NIH-funded research focuses on advancing projects on stress, addiction, and violence. Funded by a $907,742 grant from NIH, Dr. Johnson is conducting a study titled Examining the Stress Process of Recovery and Engagement in Substances and Service Outcomes (ESPRESSO). The ESPRESSO project quantitatively and qualitatively investigates the mechanisms by which stress impacts drug use trajectories and treatment services among adolescents involved in the justice system. The study examines the factors that can affect risk, recovery capital, access to services, and the quality of services. Beyond his research, Dr. Johnson is deeply committed to mentorship. He has founded several innovative research education programs, the Substance Misuse and Addiction Research Traineeship (SMART), which specifically trains undergraduate students in addiction research. SMART has trained over 100 students, many of whom are on track to earn MDs and graduate degrees at dozens of universities across the country. He also leads the Scientific Training in Addiction Research Techniques (START) Program, a comprehensive research education program dedicated to supporting junior scholars. START specifically prepares investigators to access, analyze, and disseminate data from the Adolescent Brain Cognitive Development (ABCD) study at University of Vermont. His dedication to mentoring future generations of scholars reflects his passion for education and workforce development. His teaching interests include research methods and behavioral health services delivery. He also founded the Community and Art-based Research, Dissemination, and Interventions (CARDI) initiative, enhancing community health through performance interventions and creative outreach.
Daniel T. Lee, MD
Clinical Professor
Dr. Daniel Lee is a Clinical Professor of Family Medicine at the David Geffen School of Medicine at UCLA. He has been on the full-time faculty of the UCLA-Santa Monica Family Medicine Residency Program since 1994 and the Associate Program Director since 2015. Dr. Lee graduated from Baylor University with a BS in Physical Education in 1987 and he received his medical degree from the University of Texas-Southwestern Medical School in 1991. He completed his residency training at the UCLA-Santa Monica Family Medicine Residency Program in 1994. Additionally, Dr. Lee obtained a MA in Christian Apologetics from Biola University in 2002. In addition to practicing and teaching the full-scope of Family Medicine to residents and medical students, Dr. Lee holds several other positions at UCLA. He is the Associate Director of the Primary Care College for the 4th year medical students at UCLA. He is the faculty advisor for the Family Medicine Interest Group at the medical school. Dr. Lee is a long-standing member of the Pharmacy, Therapeutics, and Nutrition Committee and the Medical Staff Executive Committee at the Santa Monica-UCLA Medical Center. Dr. Lee has published numerous articles in primary care journals and textbooks. Furthermore, he occasionally does manuscript reviews for the American Family Physician journal and serves as an expert reviewer for the Medical Board of California. He enjoys many sports and he used to coach his son and daughter's various sports teams until they grew up. Of all sports, he enjoys playing tennis the most. He also guest speaks at various churches around Southern California whenever he gets a chance.
Michael J. Li, PhD
Assistant Professor
Dr. Michael Li is Assistant Professor in the UCLA Department of Family Medicine and the Center for Behavioral and Addiction Medicine (CBAM). They serve as a Project Director on multiple studies under CBAM Director Dr. Steven Shoptaw while developing their own research on the role of stress biology in the links between social adversity, substance use, and HIV in sexual minorities of color. Dr. Li received a bachelor degree in biological sciences from UC Irvine, a master of public health from Cal State Fullerton, and a PhD in Preventive Medicine from the University of Southern California. They also served as a postdoctoral fellow at CBAM prior to being promoted to a faculty position.
Rose Maly, MD, MSPH
Professor Emeritus
Dr. Rose Maly is Professor Emeritus of Family Medicine. She received her BS in Biological Sciences and BA in Philosophy from UC Irvine. She earned her MD from the UC Irvine College of Medicine and an MSPH from the UCLA Fielding School of Public Health. Dr. Maly did her residency in Family Medicine at UCLA, followed by a fellowship in Geriatric Medicine at UCLA. Her honors include the New Investigator Award from the American Geriatrics Society and appointments as a Robert Wood Johnson Foundation Generalist Physician Faculty Scholar and as an American Cancer Society Research Scholar for which she was the first to receive a research grant in excess of $2 million dollars from the American Cancer Society. Her research focus is on patient-physician communication and its impact on health-related quality of life and functioning, cancer survivorship, as well as quality of care. She has used a new diagnosis of breast cancer as a paradigm to highlight elements of patient-physician communication that are key in impacting these outcomes during a particularly vulnerable period in a patient's illness experience. Dr. Maly passionately believes that the patient-physician relationship itself is one of the most healing aspects of medical practice. She has focused her research on special patient populations including the medically underserved, ethnic minorities, and the elderly that may suffer disproportionately from the consequences of poor patient-physician communication. Dr. Maly has a continuity practice in Geriatric Medicine at UCLA and teaches Doctoring courses for medical students which target topics not typically covered in a traditional medical school curriculum, including medical ethics, health care disparities, complementary and alternative medicine, and hospice and palliative care that are nonetheless critical to excellence and humanity in the practice of medicine.
Mary M. Marfisee, MD, MPH
Assistant Clinical Professor
Dr. Marfisee is an HS Assistant Clinical Professor in the Department of Family Medicine, and the Director of Medical Student Service Learning at UCLA DGSOM. She completed her Family Medicine Residency clinical training at the UCLA David Geffen School of Medicine, her MD degree at University of New Mexico School of Medicine. She completed a research fellowship in the UCLA T32 NRSA Primary Care Research Fellowship Program. Dr. Marfisee oversees the Student Homeless Clinics, a student-managed community service learning program that welcomes volunteers and is also part of the DGSOM UCLA medical curriculum. The Student Run Homeless Clinics (SRHC) were started in 1990 by the Department of Family Medicine at UCLA to provide free medical care to people who are homeless. Over the decades, she has developed lasting relationships with the Santa Monica Shelter (Samoshel), where we have provided care since 1994, as well as the Los Angeles Homeless Services Authority (LAHSA) Winter Shelters, the Union Rescue Mission and its affiliate Hope Gardens Family Center, LAS City Mobile Hygiene Units, St. Frances Center, Project Roomkey sites, and many street encampments. Her dedication to our homeless neighbors in Westwood continues. Dr. Marfisee is also an instructor for various DGSOM clinical courses (MS1 Early Authentic Clinical Experiences, MS3 Longitudinal Clinical Experiences, MS3 Discovery Experience, and MS4 clinical electives).
Spencer McCaffrey
Associate Physician Diplomate
Dr. McCaffrey was born at UCLA and raised in Santa Monica. She received her undergraduate degree from Oberlin College and then moved to Philadelphia to get her medical degree from Temple University School of Medicine. After 12 amazing years on the east coast, she made her way back west to complete her residency in Family Medicine at UCLA. She is now fortunate enough to continue working at the offices where she completed residency, seeing her own patients and helping to teach both the residents and medical students. Her interests include medical education and teaching, geriatrics and addiction medicine. When not at work you can find her at the beach, hiking or biking around town.
Julio Meza, MD
Associate Clinical Professor and Division Chief
Dr. Julio Meza is an Addiction and Family Medicine physician in the Department of Family Medicine, and is the Program Director of the department's Fellowship Program in Addiction Medicine.
Dr. Meza was born and raised in El Salvador, and graduated Cum Laude from Universidad Evangelica de El Salvador. After graduating from medical school, he was accepted into a surgical residency and completed an internship at the Hospital Militar Central in El Salvador. He left El Salvador to pursue his dream of becoming a U.S. licensed family physician. In Los Angeles, Dr. Meza worked as a medical assistant instructor and program director, training students in San Fernando, North Hollywood and Los Angeles. He then joined UCLA and completed his residency in Family Medicine and then a Fellowship in Addiction Medicine. Dr. Meza enjoys working with patients from all backgrounds and provides non judgmental compassionate care.
Emily M. Miller, MD
Assistant Clinical Professor
Dr. Emily Miller is Assistant Clinical Professor in the departments of Family Medicine and Orthopaedic Surgery. She is co-chair of the Family Medicine Core Clerkship for medical students. She joined the UCLA Sports Medicine Fellowship program in July 2017 after completing her family medicine residency at Lancaster General Hospital in Lancaster, Pennsylvania. While there she served as a chief resident and completed a sports medicine area of concentration. She received her medical degree from Temple University School of Medicine in Philadelphia and her undergraduate degree from Barnard College in New York City where she was a dancer. As part of her fellowship, Dr. Miller assisted as a team physician in the care of the UCLA Department of Intercollegiate Athletics and as the team physician for Beverly Hills High School. Her research interests include youth physical activity participation, dance medicine, and medical education. Dr. Miller was also the AMSSM Education Committee Fellow Liaison for the 2017-2018 year.
Aurelia Nattiv, MD
Clinical Professor
Dr. Aurelia Nattiv is a Clinical Professor in the UCLA Departments of Family Medicine, Division of Sports Medicine and Non-Operative Orthopaedics, and in the Department of Orthopaedic Surgery. She has served as the Director of the UCLA Metabolic Bone and Osteoporosis Center for over 20 years, and sees patients in the areas of osteoporosis across the lifespan, and sports medicine, with an emphasis on women's sports medicine. Dr. Nattiv's primary areas of research and publications have been in the area of the female athlete triad (disordered eating, amenorrhea and osteoporosis), as well as stress fracture risk factors and prevention, and osteoporosis management. She speaks nationally and internationally, and publishes extensively in these areas.
In addition to serving as a team physician for the UCLA Department of Intercollegiate Athletics since 1994, Dr. Nattiv has served as a team physician and consultant for USA Track and Field, USA Gymnastics and the United States Olympic Committee at several international venues, and is the current USA Track and Field Research Co-Chair. Dr. Nattiv has served as Chair and first author of the American College of Sports Medicine Position Stand on the Female Athlete Triad and has also co-edited a book entitled The Female Athlete. She has served as an elected member of the Board of Directors for the American College of Sports Medicine, as well as two terms for the American Medical Society of Sports Medicine, and recently received the honor of the AMSSM Founders Award. She currently serves as the President of the Female Athlete Triad Coalition, and is on the editorial board for the British Journal of Sports Medicine, and reviewer for multiple journals.
Dr. Nattiv received her medical degree at Washington University School of Medicine and completed her residency in Family Medicine at the Sonoma County Community Hospital in Santa Rosa, California. She received her sports medicine fellowship training at the UCLA Primary Care Sports Medicine Fellowship Program, and has been an integral faculty member for the fellowship training program over the last two decades.
James C. Puffer, MD
Professor Emeritus
James C. Puffer, MD is Professor Emeritus of Clinical Family Medicine in the Division of Sports Medicine at the David Geffen School of Medicine at UCLA. He served as President and Chief Executive Officer of the American Board of Family Medicine (ABFM), located in Lexington, Kentucky, from 2003-2018. Dr. Puffer is an internationally recognized expert in sports medicine, having served as Team Physician for the 1984 United States Winter Olympic Team and Head Team Physician for the 1988 United States Summer Olympic Team. He served as Team Physician for the UCLA Department of Intercollegiate Athletics for over twenty years before assuming his position at the ABFM, and has subsequently returned to UCLA on faculty recall status where he has resumed responsibilities as a team physician in the Department of Intercollegiate Athletics.
Amy Richards, MD
Assistant Clinical Professor
Dr. Richards is an Assistant Clinical Professor in the UCLA Department of Family Medicine. She is a board-certified, Addiction Medicine specialist with clinical expertise in the diagnosis and management of substance use disorders, and treating chronic pain. Her research focuses on access to addiction medicine services for marginalized populations, specifically for individuals who are experiencing homelessness and for pregnant persons who use substances. She is also board-certified in Family Medicine, and works in full spectrum care including with pediatric patients, women’s health, and geriatric care. Her treatment objectives include prioritizing patients’ goals, whole-person care and practicing evidence-based medicine.
Michael Rodríguez, MD, MPH
Professor Emeritus
Dr. Michael A. Rodríguez, MD, MPH is Professor Emeritus in the Department of Family Medicine at the David Geffen School of Medicine at UCLA, past founding chair of the UCLA Global Health Minor, founding director of the Health Equity Network of the Americas, Co-Director of the UCLA Firearm Violence Prevention Center, and founding director of the UCLA Blum Center on Poverty and Health in Latin America. Dr. Rodríguez is published widely in the areas of research that include, ethnic/racial and immigrant health equity, gun and intimate partner violence prevention, and primary care systems. He has consulted for the World Health Organization, UNICEF, the Pan American Health Organization, the Centers for Disease Control and Prevention and the Institute of Medicine. He is also a Board Member for Blue Shield of California, and the Latino Coalition for a Healthy California. Dr. Rodriguez mentors and teaches UCLA faculty and trainees in a wide range of disciplines. Dr. Rodriguez completed his undergraduate training at the University of California, Berkeley; received his medical degree from the David Geffen School of Medicine at UCLA; completed his residency from the UC San Francisco's Family Medicine Residency Program; received his Master of Public Health degree at the Johns Hopkins University School of Hygiene and Public Health; and was a Robert Wood Johnson Clinical Scholar at Stanford University.
Derjung Mimi Tarn, MD, PhD
Professor
Derjung Mimi Tarn, MD, PhD is Professor of Family Medicine at the David Geffen School of Medicine at UCLA and a practicing family physician. Dr. Tarn’s career is marked by a passionate commitment to advancing primary care research, with a focus on preventive health, medication adherence, and physician-patient communication. Her recent endeavors center on bolstering the utilization of preventive health services among older adults. Dr. Tarn employs a multi-faceted approach in her research, using both qualitative and quantitative research methods, including audio recordings of office visits, semi-structured interviews, focus groups, and surveys. Recognized for her outstanding contributions, Dr. Tarn is the recipient of the Family Practice Excellence in Research Award from the California Academy of Family Physicians and has received an Honorable Mention for the Society of Teachers in Family Medicine (STFM) Best Paper Award. Her research has been featured through Distinguished and Extended Paper talks at meetings of the Society of Teachers in Family Medicine and North American Primary Care Research Group. Dr. Tarn’s research is supported by grants from the National Institutes of Health, Patient Centered Outcomes Research Institute, and Food and Drug Administration.
Dr. Tarn earned B.S. and M.S. degrees in Biological Sciences from Stanford University, an M.D. from New York Medical College, and a Ph.D. in Health Services from UCLA. She honed her expertise through advanced research training via the National Research Service Award (NRSA) Primary Care Research and UCLA Specialty Training and Advanced Research (STAR) fellowships at UCLA.
Amanda Tran, MD
Associate Clinical Professor
Dr. Amanda Tran graduated from UCLA with a BS in Psychobiology. After graduating, she worked as a behavior therapist for children with autism spectrum disorder. She then came back to UCLA for medical school and remained at UCLA to complete her Family Medicine Residency. She will be joining the Department of Family Medicine in August 2025, where she will continue to provide full-spectrum care for patients and teach residents. Her areas of academic and clinical interest include pediatrics, outpatient procedures, and care of communities. Outside of medicine, she enjoys spending time with family and friends, watching Disney movies, and eating desserts.
Paula Trepman, MD, MPH
Associate Clinical Professor
Dr. Trepman earned her MD from Stanford and MPH from Columbia University and brings strong training and commitment to full-spectrum family medicine. She completed her family medicine residency clinical training at the University of Washington (Research, Reproductive Health, and Obstetrics Tracks). After residency she worked locum tenants in various community urban and rural health centers to expand her scope of practice and clinical experiences. She will be providing care at the UCLA Family Health Center and additional clinical sites while also teaching medical students and residents. Her interests include women's health, primary care, and advancing equitable health outcomes.
Marissa S. Vasquez Machuca, MD, MBA
Associate Clinical Professor
Dr. Marissa Vasquez is Associate Clinical Professor in the Department of Family Medicine, Division of Sports Medicine at UCLA. Dr. Vasquez serves as the Primary Care Head Team Physician for the LA Dodgers. Dr. Vasquez has been a life-long recreational and competitive swimmer. She received her medical degree from Temple University School of Medicine in Philadelphia. She completed her residency training in family medicine at White Memorial Medical Center in Los Angeles, and her fellowship in primary care sports medicine at Kaiser Permanente Los Angeles Medical Center. In 2018, she earned her executive MBA degree with a Certificate in Marketing from the UCLA Anderson School of Management. She was awarded the “Best and Brightest Executive MBAs for 2018” recognition.
Before joining UCLA Health, Dr. Vasquez was the Sports Medicine Fellowship Director and Division Chief for Sports Medicine at Kaiser Permanente in Los Angeles. She served as a physician ambassador for the Permanente Medical Group where she earned the Physicians Exceptional Contribution Award, which is the most prestigious award in the partnership. She was also the Lead Physician for the 2015 Special Olympics World Games, held at UCLA, and the Primary Care Head Team Physician for Occidental College.
Dr. Vasquez conducts clinical research and has co-authored articles in the Clinical Journal of Sports Medicine. She serves on several committees for the American Medical Society for Sports Medicine. She has expertise in providing culturally responsive care and in presenting evidence-based research to communities with health disparities.
Daniel Vigil, MD
Clinical Professor and Division Chief
Dr. Daniel Vigil is Health Sciences Clinical Professor of Family Medicine and Orthopaedic Surgery and serves as Chief of the Divisions of Primary Care Sports Medicine for these departments at UCLA. He is also the Associate Head Team Physician for the UCLA Department of Intercollegiate Athletics. Dr. Vigil was a collegiate sprinter at Stanford, later earned his medical degree from Harvard, returned to California for his residency training in Family Medicine at Kaiser Permanente, then completed his Sports Medicine fellowship at UCLA.
After his Sports Medicine training at UCLA, Dr. Vigil established the Division of Sports Medicine and co-founded the Primary Care Sports Medicine Fellowship Program at Kaiser Permanente in Los Angeles. He then returned to UCLA where he now cares for Family Medicine and Sports Medicine patients of all ages, while supervising UCLA medical students, residents, and Sports Medicine Fellows. Dr. Vigil sees patients at UCLA in Santa Monica and also in his musculoskeletal medicine consultation clinic at the Mid-Valley Comprehensive Health Center in Van Nuys.
Dr. Vigil cares for Family Medicine and Sports Medicine patients of all ages, while supervising UCLA medical students, residents, and Sports Medicine Fellows. In addition to his patient care and teaching duties at UCLA, Dr. Vigil is the Medical Director of UCLA Health Sports Performance Powered by EXOS, a collaboration between UCLA Health and EXOS to provide training and nutrition programs for athletes to reach their peak performance. Dr. Vigil is also the Associate Head Team Physician and Director of Primary Care for the Los Angeles Lakers as part of a collaboration between the Lakers and UCLA Health. Outside of UCLA, Dr. Vigil has been a team physician for several USA Track & Field teams at international competitions including the World Championships, World Cup, Continental Cup and Pan American Games. He has also served as a physician at the United States Olympic Training Center in Chula Vista, CA. Dr. Vigil's research interests include heat illness and dehydration, overuse injuries and pre-participation screening, and the use of musculoskeletal ultrasound in the treatment of sports-related injuries. He has conducted research in these areas and has authored scientific articles, case reports, and book chapters in these and other areas of sports medicine.
David J. Wallenstein, MD
Associate Clinical Professor
Dr. David Wallenstein is a general internist who specializes in palliative care (the supportive treatment of patients with life threatening and terminal illnesses) and in chronic pain management. Dr. Wallenstein has an appointment in the Department of Family Medicine and works with the Sarcoma Program. He is also medical director for the Skirball Hospice Program at the Jewish Homes of Los Angeles and an instructor and preceptor in the UCLA Family Medicine International Medical Graduate Program. Dr. Wallenstein began his career in end-of-life care as an AIDS volunteer in the early 1980s, trained in clinical social work and after a career as a clinical social worker, decided to attend medical school. A Westwood native who attended UCLA’s lab school, UES, and the Cate School in Carpinteria, he is a graduate of both the College of the University of Chicago and of the University of Chicago School of Social Service Administration and received his medical degree from the University of Illinois at Chicago College of Medicine. Dr. Wallenstein trained in internal medicine at the University of Illinois Hospital in Chicago and in anesthesiology at the Johns Hopkins Hospital in Baltimore before completing a fellowship in pain medicine and palliative care under the direction of Dr. Russell Portenoy at Beth Israel Medical Center in Manhattan. In his leisure time, Dr. Wallenstein is an opera and classical music afficionado who rescues dogs and is involved in various aspects of animal welfare.
Timothy E. Weiss, MD
Associate Clinical Professor
Dr. Timothy Weiss joined the Department of Family Medicine in 2014. He was raised in Southern California, and attended UCLA where he majored in biology and minored in music history. He then attended medical school at Loma Linda University, then came back to UCLA for his Family Medicine residency. After residency, he completed a fellowship in Palliative and Hospice Medicine at UCLA. He now spends his time working on the UCLA inpatient palliative service, seeing patients in Family Medicine clinic as well as palliative clinic, and working as a team physician and Associate Medical Director at Skirball Hospice. He works closely with fellows in training through the UCLA Palliative and Hospice Medicine fellowship, and also works with residents in clinic and in the hospital. In his non-working life, he hikes, runs, listens to a lot of music, and watches the Dodgers.
Anita Wong, MD
Assistant Clinical Professor
Dr. Anita Wong joined the UCLA Department of Family Medicine in July 2018. She is from the Bay Area in Northern California, and graduated from UC Berkeley with a BA in Molecular and Cell Biology and a minor in Education. She then attended medical school at the David Geffen School of Medicine at UCLA, and remained at UCLA for her residency in Family Medicine, during which time she developed her passion for medical student and resident education. After graduating in 2014, she stayed at UCLA Family Medicine to complete a PGY 4 Chief Resident year. Her clinical interests include full spectrum inpatient and outpatient Family Medicine, with a focus on women's health, adolescent medicine, and outpatient procedures. She is currently working on developing a curriculum for the intern class and improving the resident research curriculum. Outside of work, she enjoys hiking, traveling, watching football and basketball, and experimenting in the kitchen with her fiancé.